3149978 has 16 divisors (see below), whose sum is σ = 5145000. Its totient is φ = 1437696.

The previous prime is 3149969. The next prime is 3149983. The reversal of 3149978 is 8799413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1968409 + 1181569 = 1403^2 + 1087^2 .

It is a super-2 number, since 2×3149978² = 19844722800968, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898 + ... + 3146.

Almost surely, 2^3149978 is an apocalyptic number.

3149978 is a deficient number, since it is larger than the sum of its proper divisors (1995022).

3149978 is a wasteful number, since it uses less digits than its factorization.

3149978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its digits is 54432, while the sum is 41.

The square root of 3149978 is about 1774.8177371212. The cubic root of 3149978 is about 146.5893796200.

The spelling of 3149978 in words is "three million, one hundred forty-nine thousand, nine hundred seventy-eight".